Oxoquinazoline carbamates

Abstract

An oxoquinazoline carbamate of the formula ##STR1## in which R represents hydrogen, alkyl, alkoxy, alkoxyalkyl, alkylthio, alkylthioalkyl, halogenoalkyl or optionally substituted aryl, R 1 represents alkyl, R 2 represents halogenoalkyl, R 3 represents alkyl or halogen and n represents a number from 0 to 4, which possess fungicidal and microbicidal activity.

We claim: 
     
       1. An oxoquinazoline carbamate of the formula ##STR24## in which R represents hydrogen, straight-chain or branched alkyl, alkoxy, alkoxyalkyl, alkylthio or alkylthioalkyl, each having up to 6 carbon atoms per alkyl radical, halogenoalkyl having up to 3 carbon atoms and up to 7 identical or different halogen atoms, or aryl which has 6 to 10 carbon atoms and is optionally monosubstituted or polysubstituted by identical or different substituents selected from alkyl having up to 4 carbon atoms, halogenoalkyl having up to 3 carbon atoms and up to 5 halogen atoms, and halogen, R 1  represents straight-chain or branched alkyl having up to 6 carbon atoms,   R 2  represents halogenoalkyl having up to 3 carbon atoms and up to 7 identical or different halogen atoms,   R 3  represents straight-chain or branched alkyl having up to 4 carbon atoms, or halogen, and   n represents a number from 0 to 3.   
     
     
       2. An oxoquinazoline carbamate according to claim 1, wherein R represents hydrogen, straight-chain or branched alkyl, alkoxy, alkoxyalkyl, alkylthio or alkylthioalkyl, each having 1 to 4 carbon atoms per alkyl radical, halogenoalkyl having 1 to 2 carbon atoms and 1 to 5 identical or different halogen atoms, or phenyl which is optionally monosubstituted to trisubstituted by identical or different substituents selected from fluorine, chlorine, bromine, methyl, ethyl, trifluoromethyl and trichloromethyl,   R 1  represents straight-chain or branched alkyl having 1 to 4 carbon atoms,   R 2  represents halogenoalkyl having 1 to 2 carbon atoms and 1 to 5 identical or different halogen atoms,   R 3  represents methyl, ethyl, fluorine, chlorine or bromine, and   n represents the number 0, 1 or 2.   
     
     
       3. A compound according to claim 1, wherein such compound is N-methyl N-dichlorofluoromethylsulphenyl O-(2-ethyl-3,4-dihydro-4-oxo-quinazolin-3-yl) carbamate of the formula ##STR25## 
     
     
       4. A compound according to claim 1, wherein such compound is N-methyl N-dichlorofluoromethylsulphenyl O-(2-methyl-3,4-dihydro-4-oxo-quinazolin-3-yl) carbamate of the formula ##STR26## 
     
     
       5. A compound according to claim 1, wherein such compound is N-methyl N-dichlorofluoromethylsulphenyl O-(2-phenyl-3,4-dihydro-4-oxo-quinazoline-3-yl) carbamate of the formula ##STR27## 
     
     
       6. A compound according to claim 1, wherein such compound is N-methyl N-dichlorofluoromethylsulphenyl O-(2-methoxy-3,4-dihydro-4-oxo-quinazoline-3-yl) carbamate of the formula ##STR28## 
     
     
       7. A fungicidal composition comprising a fungicidally effective amount of a compound according to claim 1 in admixture with a diluent. 
     
     
       8. A method of combatting fungi which comprises administering to such fungi or to a fungus habitat a fungicidally effective amount of a compound according to claim 1. 
     
     
       9. The method according to claim 8, wherein such compound is N-methyl N-dichlorofluoromethylsulphenyl O-(2-ethyl-3,4-dihydro-4-oxo-quinazolin-3-yl) carbamate,   N-methyl N-dichlorofluoromethylsulphenyl O-(2-methyl-3,4-dihydro-4-oxo-quinazolin-3-yl) carbamate,   N-methyl N-dichlorofluoromethylsulphenyl O-(2-phenyl-3,4-dihydro-4-oxo-quinazolin-3-yl) carbamate, or   N-methyl N-dichlorofluoromethylsulphenyl O-(2-methoxy-3,4-dihydro-4-oxo-quinazolin-3-yl) carbamate.